DE602005006281T2 - HEAT EXCHANGER WITH SPOUT SPOOL / N AND SPIRAL / N LAMELLE / N - Google Patents

Description

The The invention relates to a heat exchanger for heating or cooling a secondary one liquid from a primary Medium circulating in at least one tubular spiral serpentine, which is arranged in at least one exchange recess in which the secondary Liquid circulates.

Such a heat exchanger can be used, for example, as a condenser of a heat pump for heating the water of a swimming pool. in the FR-2 686 408 Thus, an example of such a heat exchanger is described with Serpentine, which includes spacers in the form of longitudinal bands that form recordings for the turns of the serpentine. With such spacers, in fact, the serpentine can be centered in the exchange well and the circulation of the secondary fluid around the turns of the serpentine optimized. in the US-A-1893484 a heat exchanger with serpentine and spiral spacer ribs is described.

One such exchanger is satisfactory, but it is desirable, its heat output while improving its overall dimensions too reduce its costs and space requirements.

The The invention thus generally aims to provide a heat exchanger with Serpentine (s) to propose its heat output - in particular the reproduced heating capacity - compared to previous exchangers improved is, and with the same or reduced general dimensions.

The The invention aims in particular at simplifying this goal and economical way to achieve and without the other characteristics damage to the exchanger (lifetime, ease of installation, ...).

• – Ein äußeres Gehäuse mit einer inneren Wand, die mindestens eine innere Kammer begrenzt, die mindestens einen Kern aufweist, die eine Wand aufweist, die in der Kammer mit der inneren Wand des Gehäuses gegenüber mindestens eine Austauschvertiefung begrenzt;
• – In jeder Austauschvertiefung mindestens eine röhrenförmige hohle spiralförmige Serpentine, die Enden aufweist, die das Gehäuse durchqueren, damit sie mit einem primären Medium versorgt werden können, das in dieser Serpentine zirkuliert;
• – Mindestens einen Eingang an einem axialen Ende der Austauschvertiefung und mindestens einen Ausgang an einem anderen axialen Ende entgegengesetzt zur Austauschvertiefung, so daß eine Zirkulation einer sekundären Flüssigkeit in einer axialen Zirkulationsrichtung in der Austauschvertiefung zwischen diesem Eingang und diesem Ausgang hergestellt werden kann, und zwar mit Kontakt und außerhalb jeder Serpentine, die sie erhält;
• – Abstandshalterelemente jeder Serpentine und der inneren Wand des Gehäuses und/oder der Wand des Kerns gegenüber, dadurch gekennzeichnet, daß die Abstandshalterelemente mindestens eine Abstandshalterrippe, eine sogenannte tangentiale Rippe umfassen, die sich hervorstehend ab einer gegenüber der entsprechenden Serpentine ausgerichteten Wand erstreckt und nicht parallel zur axialen Zirkulationsrichtung, die aber so angepaßt ist, daß sie nicht jegliche Zirkulation der sekundären Flüssigkeit nach der axialen Zirkulationsrichtung zwischen der besagten Wand und der Serpentine verhindert.

For this purpose, the invention relates to a heat exchanger with the following elements:

• An outer housing having an inner wall defining at least one inner chamber having at least one core having a wall defining in the chamber with the inner wall of the housing opposite at least one exchange recess;
• In each replacement recess, at least one tubular hollow spiral serpentine having ends which pass through the housing to be supplied with a primary medium which circulates in this serpentine;
• At least one inlet at one axial end of the replacement well and at least one outlet at another axial end opposite the exchange well so that a circulation of a secondary liquid in an axial circulation direction can be established in the exchange well between that inlet and that outlet Contact and outside every serpentine she gets;
• Spacer elements of each serpentine and the inner wall of the housing and / or the wall of the core opposite, characterized in that the spacer elements comprise at least one spacer rib, a so-called tangential rib which protrudes from a wall facing the corresponding serpentine and not parallel to the axial circulation direction, but adapted so as not to prevent any circulation of the secondary liquid in the axial direction of circulation between said wall and the serpentine.

in the heat exchanger according to the invention the spacer elements comprise at least one helical tangential Rib, and this spiral tangential rib and these serpentine have different Einrollrichtungen so that she are in contact at the substantially point contact zones. The inventors have indeed found that with this particular structure the heat output the exchanger considerably and could be improved in an unexpected way. The inventors have in particular an improvement of 5% to 10% of the thermal output of the exchanger. The inventors can not give this result clear explanation give. However, it is likely that such tangential ribs - especially spiral - the impact have, on the one hand, the residence time of the secondary liquid in the exchange well to increase, without creating a pressure loss, and by the contact and the exchange area favored with the serpentine becomes.

advantageously, and according to the invention the tangential spiral Rib and Serpentine different gears on, so they in the in contact points of contact.

When Variant can be at least one rib in the form of a section of a ring surface or a section of a ring with a non-circular section be provided (for example, polygonal), based on a section extending from below 360 degrees about the axial direction.

In an advantageous embodiment of the invention, the rolling direction is at least one tangential helical distance halter rib opposite to that of the serpentine opposite. Advantageously and according to the invention, the passage is at least one tangential spiral spacer rib greater than that of the serpentine. Advantageously and according to the invention, the passage faces at least one tangential helical spacer rib between 1.5 and 3 times that of the serpentine.

Further Advantageously and according to the invention, each core comprises at least one tangential spacer rib, a so-called inner rib. These inner rib comes in contact with the aligned to its axis of symmetry inner surface of the Serpentine. Further advantageously and according to the invention in each exchange recess, the inner wall of the housing at least a tangential spacer rib, a so-called outer rib. This outer rib comes with the outer surface of the Serpentine in contact, which is radial with respect to its axis of symmetry furthest out located.

Especially Advantageously and according to the invention, in at least one Exchange recess the core at least one inner tangential Spacer rib on, and the inner wall of the housing facing at least one outer tangential Spacer rib on. Preferably and according to the invention each exchange recess has at least one inner rib and at least one outer rib on.

Further and advantageously, the exchanger according to the invention is characterized in that the Exchange recess an inner spiral rib and an outer spiral rib and in that the Girth of the inner rib different from the gait of the outer rib is. Advantageously and according to the invention, the course of the outer rib greater than the gait of the inner rib, which itself is greater than the gait of the in the Exchange recess contained serpentine (s) is.

advantageously, and according to the invention the outer rib and the inner rib the same rolling direction.

Further Advantageously and according to the invention is at least one exchange recess provided with at least one series of wedges suitable for to be interposed between the coils of the serpentine, so that the relative axial distance is maintained. Advantageously and according to the invention the exchange recess radially protruding from the inner wall of the housing Wedges on.

Also Advantageously and according to the invention, the housing for each inner chamber comprises two shells, one half each form a cylinder and together by an axial connection plane are mounted. Thus, the assembly of the serpentine and the core simplified in the chamber and is inserted in one of the Trays and subsequent closing of the chamber by overlapping through the other shell and tight assembly - especially by welding - the two Trays executed according to their axial connection level.

In addition, advantageously and according to the invention casing with openings for the passage the ends of the serpentine, which are orthogonal to the axis of run inside the chamber. The exchanger according to the invention thus has a reduced axial space requirements, and its installation is simple, quick and easy reliable. Furthermore, any error in the connection direction of the Serpentine the source of the primary Medium avoided.

at an advantageous embodiment mode the exchanger according to the invention characterized in that a single exchange recess comprising a single serpentine encloses wherein the exchange recess has a radial width, the at least clearly the sum of the radial thickness of the outer and the inner tangential ribs and the diameter of the straight Section of the serpentine forming tube corresponds.

advantageously, and according to the invention is the radial Width of an exchange recess about 10 mm to 15 mm, and the Outside diameter of the straight section of the serpentine forming tube this Exchange recess is about 7 mm to 13 mm, and the radial thickness of each tangential spacer rib is between 1 mm and 3 mm.

advantageously, and according to the invention casing and each core is formed from a plastic molding, and every serpentine is formed of a metal or a metal alloy.

The Invention also relates to a heat exchanger, in combination all or part of the above or below cited Characteristics is marked.

Further Objects, features and advantages of the invention will become apparent upon reading the following description, referring to the figures in Annex refers to the execution modes represent the invention and given as examples without limitation and where:

The 1 is a schematic perspective view of a exchanger in a first Ausfüh tion mode of the invention;

The 2 Figure 11 is a schematic view of an axial section of a first embodiment of an exchanger in a first embodiment of the invention with other sections showing the serpentine and core in place and visibly from left and right, respectively; the serpentine in section and the core visible; the serpentine on average without the core; neither the serpentine nor the core to illustrate the spacer elements;

The 3 is a partial perspective schematic view of a housing shell of the exchanger of 1 and 2 ;

The 4 is a partial perspective schematic view of a housing shell of the exchanger similar to the 3 with the existing core, but without the serpentine, for illustrative purposes only;

The 5 is a partial perspective schematic view of a housing shell of the exchanger similar to the 3 with existing serpentine and core;

The 6 is a schematic view of a cross section of the exchanger of 2 ;

The 7 to 9 Fig. 11 are plane views illustrating a serpentine and a core and a shell of an exchanger in a second embodiment of the invention, respectively;

The 10 to 12 Fig. 11 are plane views illustrating a serpentine and a core and a shell of an exchanger in a third embodiment of the invention, respectively;

The Figures represent various embodiments of a heat exchanger according to the invention for example as a condenser in a heat pump for heating the water a swimming pool can serve.

This exchanger comprises an outer casing 1 that made two bowls 1a . 1b is formed of a rigid material, preferably a plastic, having an axial peripheral connection plane 2 assembled together. The housing 1 defines an overall symmetrical cylindrical inner chamber 3 for rotation about an axis 4 , and the connection level 2 is a diametrical plane of the inner chamber 3 and the axis 4 ,

The one 1a the two shells 1a . 1b is provided with through inputs and outputs, on the one hand for the ends of at least one in the inner chamber 3 built-in serpentine 5 , and on the other hand for a secondary liquid, which is in the inner chamber 3 in contact with the serpentine (s) 5 can circulate. At the on the 1 to 6 and 10 to 12 Examples shown is a single serpentine 5 into the inner chamber 3 built-in.

The inner chamber 3 also encloses a cylindrical core 6 with coaxial rotation, that is, the one cylindrical wall 7 with rotation about a same axis 4 like the chamber 3 having. The housing 1 also has an overall cylindrical symmetrical inner wall 8th with rotation around the axis 4 on that the inner chamber 3 demarcates.

Thus, an annular generally symmetrical cylindrical exchange recess is formed 9 with rotation about an equal axis between the inner wall 8th of the housing 1 and the wall 7 of the core 6 limited, and this between the two axial ends of the chamber 3 ,

The shell 1a indicates a 10 its axial ends a through opening 11 on, between the exterior and the exchange recess 9 makes a connection for the passage of the secondary liquid, and a through opening 12 also between the exterior and the exchange recess 9 a connection for the passage of an end 13 the serpentine 5 for the circulation of a primary medium in this tubular hollow spiral serpentine.

Likewise, at the other axial end 14 the Bowl 1a a continuous opening 15 provided between the exterior and the exchange recess 9 makes a connection for the passage of the secondary liquid, and a through opening 16 which is a connection between the exterior and the exchange recess 9 for the passage of another end 17 the serpentine 5 manufactures.

The bowls 1a . 1b each form one half of a cylinder, and the connection plane 2 is rectangular overall. Preferably, the openings 11 . 15 for the passage of the secondary liquid, which is at the opposite ends 10 . 14 even in relation to the connection level 2 diagonally opposite.

Likewise, the openings 12 . 16 for the passage of the ends of the serpentine 5 preferably in relation to the compound plane 2 diagonally opposite. It must also be noted that the through holes 12 . 16 for the ends 13 . 17 the serpentine 5 through the housing 1 orthogonal to the axis 4 the inner chamber 3 run. This arrangement allows in particular, the assembly of the serpentine 5 to simplify, to avoid any errors in the connection in the circulation direction of the primary medium and further to reduce the axial space requirement of the exchanger according to the invention.

The serpentine 5 is preferably tubular, hollow and spiral with non-juxtaposed convolutions wound about an axis of symmetry coincident with the axis 4 coincides when the serpentine 5 in the exchange recess 9 is. It must be noted that the serpentine 5 a series of turns wound in a single direction between its two axial ends, or, on the contrary, a plurality of series windings, one after the other, that is several cylindrical thicknesses with coaxial turns, the reciprocations of the primary medium in the Interior of the exchange recess 9 form.

There may also be several coaxial serpentines 5 be provided, as when on the 7 to 9 illustrated second embodiment, where the exchanger two coaxial serpentines 5 includes. In this case, the shell points at its axial end 10 two openings 12 for the passage of the ends 13 the two serpentines 5 on, and at its other axial end 14 two openings 16 for the passage of the other ends 17 the two serpentines 5 , Thus, two independent circulations of primary medium in the exchange well 9 running, one in each serpentine 5 , Longitudinal, that is parallel to the axis 4 extending spacer bars 21 are preferably between the two coaxial serpentines 5 interposed.

Every serpentine 5 can be advantageously formed from a tube made of metal or metal alloy - in particular of titanium or titanium alloy.

In the exchanger according to the invention has the inner wall 8th of the housing 1 at least one tangential spacer rib 18 on, extending radially to the axis 4 extends over a certain thickness, so that the serpentine 5 opposite this wall 8th is spaced. Such a tangential rib is further adapted to not allow any circulation of secondary liquid in the axial direction between the wall 8th and the serpentine 5 avoided. In fact, otherwise, the tangential rib would be 18 not specifically interesting (in relation to a direct contact of the serpentine 5 with the wall 8th ).

In the illustrated examples, and advantageously and according to the invention, the tangential rib is 18 a helical rib, that is, in the form of a continuous screw with non-adjacent turns between the two axial planes of the inner wall 8th extends. This spiral rib 18 gets from the two shells 1a . 1b educated. The spiral-shaped rib 18 has such a gear and / or a rolling on that the Serpentine 5 after the substantially point contact zones in contact with this spiral rib 18 comes. It should be noted that the invention is in contrast to all previously known assemblies in which the spacer elements were also adapted to approximate the shapes of the serpentine to lock the turns relative to the housing. In contrast, in an exchanger according to the invention on the inner wall 8th of the housing 1 designed spiral rib 18 , the so-called outer rib 18 , in contact with sections of the serpentine 5 that are radially farthest from the axis 4 are removed.

The rolling direction of the outer spiral rib 18 is thus advantageously opposite to that of the serpentine 5 across from. In addition, the course of the outer spiral rib 18 larger than that of the serpentine 5 and is, for example, between 1.5 and 3 times that of the serpentine 5 across from. Therefore, the circulation of the secondary liquid in the exchange well 9 take place in the axial direction. Nevertheless, the helical rib disturbs this axial circulation and whirling movements of the secondary fluid around the serpentine 5 forming pipe with it, which favors the heat exchange.

The same is the wall 7 of the core 6 with a tangential rib 19 which also advantageously takes the form of a helical rib with that of the serpentine 5 has opposite rolling direction, that is identical to that of the spiral rib 18 the inner wall 8th of the housing 1 ,

In the illustrated examples and according to the invention thus points in the exchange recess 9 the inner wall 8th of the housing 1 a spiral spacer rib, a so-called outer rib 18 , on, and the core 6 has a spiral spacer rib, a so-called inner rib 19 , on.

Preferably, advantageously and according to the invention, the course of the inner rib differs 19 from the course of the outer rib 18 , In particular, there are good results with an outer rib 18 been achieved, which is a larger gear than that of the inner rib 19 having, the self larger than the passage of the exchange recess 9 contained serpentine 5 is. The on the 10 to 12 illustrated third embodiment differs from the first on the 1 to 6 illustrated execution mode by the number of turns of Serpentine 5 which is lower. In this case, the serpentine has a shorter length, and one 17 its axial ends can be out of the shell 1a through an opening 16 emerge axially spaced at a reasonable distance from the other opening 12 located at the axial end 10 the Bowl 1a located. The heat output of the ribs is lower. It is noted, however, that the core 6 and the bowls 1a . 1b in favor of low production costs similar to those of the other execution modes. Further embodiments are possible. It is possible, for example, to provide further embodiments in which the number and / or the course of the ribs and / or their rolling direction differ from those of the illustrated.

The serpentine 5 So it's with the inner rib 19 in contact in the essentially point contact zones and does not come into direct contact with the wall 7 of the core 6 , These spiral ribs 18 . 19 allow the axial circulation of the secondary fluid, but write this secondary fluid swirling around the tube of the serpentine 5 in front.

Every tangential rib 18 . 19 preferably has a contact surface with the serpentine 5 up, that's just. Advantageously, the straight transverse portion of each tangential rib 18 . 19 polygonal, in particular rectangular, square or trapezoidal.

At the same time it is advantageous to the axial relative distance of the various turns of the serpentine 5 to preserve any appearance of vibration or displacement of these turns upon the circulation of the secondary liquid in the exchange well 9 to avoid. Then, advantageously, the exchange well 9 with at least one series of wedges 20 provided that are suitable to move between the coils of the serpentine 5 to be interposed to maintain their relative axial distance. Advantageously, these wedges 20 from the inner wall 8th of the housing 1 be formed protruding, radially to the interior (ie to the axis 4 ), for example from both sides of the connection layer 2 on each of the bowls 1a . 1b , These wedges 20 can be formed, for example, from thin and radial partitions, which are responsible for receiving the tube of Serpentine 5 between them are suitable.

Thus, the serpentine 5 perfect in the exchange recess 9 on the one hand radially between the outer rib 18 and the inner rib 19 and on the other hand axially through the wedges 20 blocked.

It must be noted that the wedges 20 not over the whole periphery of the inner wall 8th extend, and this to the axial circulation of the secondary fluid in the exchange well 9 not prevent.

At the on the 1 to 6 and 10 to 12 As shown, the rib comprises a single exchange well 9 , a single serpentine 5 with a single central core 6 , The radial width of the exchange recess 9 may be 10 to 15 mm, and the outer diameter of the straight section of the serpentine 5 forming tube is 7 mm to 13 mm. The radial thickness of each rib 18 . 19 can be between 1 mm and 3 mm.

It should be understood, however, that the invention applies equally well to a multiple exchange well exchanger 9 can be used with several parallel or serially mounted serpentines. The principle of the invention, which consists of tangential spacer ribs on the core 6 and on the inner wall 8th of the housing can be applied to any form of exchange recess.

The housing 1 and the core 6 can be formed from a molded synthetic material - especially polyamide - which has the advantage of lightness, low cost, high rigidity and high strength and also the execution of the two shells 1a . 1b and their relative welding to each other, for example by vibration welding. This weld has good tightness, is reliable and has a long life.

The ends 13 . 17 the serpentine 5 pass through the corresponding openings 12 . 16 of the housing 1 ,

Advantageously, it is applied to each opening 12 . 16 around the tubular end of the serpentine 5 screwed from the outside a tight connection. Such a tight connection is itself well known.

The invention is advantageously applicable to the implementation of a condenser for a heat pump for heating the water of a swimming pool. In this case, one of the openings 11 . 15 connected to the circuit of the heat pump to prevent water from entering the exchange well 9 to form, and the other opening 15 . 11 forms the outlet of the water from this exchange recess 9 , The water enters the off exchange recess 9 essentially in the form of vapor and exits substantially in liquid form. The ends of each serpentine 5 are in turn connected to a circuit with primary medium, which in the example is a refrigerant, with which the water in its passage in the exchange recess 9 can be cooled. The circulation in the serpentine / serpentines 5 takes place in countercurrent to the circulation of the water in the exchange recess 9 , Thus, the end forms 17 every serpentine 5 located at the same axial end of the housing 1 as the water outlet is, the entrance of the primary medium into the serpentine 5 , and this primary medium passes through the opposite end 13 the serpentine 5 which is at the same axial end as the water inlet 11 ,

The Invention can be the subject of many variants and more Applications than those described above and on the figures shown.

For example, the spiral ribs 18 . 19 be replaced by tangential ribs in the form of round or annular sectors, which are relative to the axis 4 extend radial planes and cross over the inner wall 8th of the housing 1 and the core 6 are inserted. Instead of the continuous helical ribs, ribs can also be provided in interrupted and / or displaced screw sections with different or equal gears ... The replacement housing, the serpentine (s) and the core can not be symmetrical about an axis or cylinder, or they can be cylindrical be without a circular base ...

EXAMPLE

It are comparative tests between a heat exchanger, the so-called Exchanger according to the first embodiment of the invention and a heat exchanger, performed the so-called Eichtauscher, which is similar to the witness exchanger, except, what the rolling direction of the tangential ribs and the rolling direction the Serpentine, which in the Eichtauscher in a same im Contrary to the invention extending rolling direction aligned are.

In each of the heat exchangers of the test, water is circulated at 24 ° C at a flow rate of 5 m ³ / h in the exchange well, countercurrent to the circulation of the water in the heat exchanger at 90 ° C at a flow rate of 10 m ³ / Hour in the serpentine circulate. After a period of at least 15 minutes to produce the temperature of the witness exchanger and the calibrator, at least five elevations of the temperature of the secondary effluent from each of the two heat exchangers of the test are taken at regular intervals over a period of one hour. Based on these surveys, an average of the temperature obtained at the exit of each heat exchanger is calculated.

you notes that the secondary Liquid on Output of the witness exchanger an average 1.5 ° C higher temperature as that of the secondary liquid has at the exit of the Eichtauschers. This temperature difference corresponds to a gain in heat output of 8.7% for opposite the witness exchanger the Eichtauscher.

Claims (21)

A heat exchanger, comprising: - an outer housing ( 1 ) with an inner wall ( 8th ), which has at least one inner chamber ( 3 ) containing at least one core ( 6 ), which includes a wall ( 7 ) located in the chamber ( 3 ) with the inner wall ( 8th ) of the housing opposite at least one exchange recess ( 9 ), - in each exchange recess ( 9 ) at least one hollow, tubular Serpentine ( 5 ), the ends ( 13 . 17 ), the housing ( 1 ) to be supplied with a primary medium which is in this serpentine ( 5 ) circulates, - at least one input ( 11 . 15 ) to an axial end of the exchange well ( 9 ) and at least one output ( 15 . 11 ) to another axial end in such a way opposite the exchange well ( 9 ), so that upon contact each serpentine ( 5 ), which receives it and on the outside of which a circulation of a secondary liquid according to an axial circulation direction in the exchange recess (FIG. 9 ) between this input ( 11 . 15 ) and this output ( 15 . 11 ), spacer elements ( 18 . 19 ) every serpentine ( 5 ) and the inner wall ( 8th ) of the housing and / or the wall ( 7 ) of the core ( 6 ), - the spacer elements ( 18 . 19 ) comprise at least one as tangential ribbing ( 18 . 19 ) referred Spacer ribbing, the projecting in relation to a relative to the corresponding serpentine ( 5 ) oriented wall ( 7 . 8th ) and is not parallel to the axial direction of circulation, but is adapted to not the entire secondary circulation of the liquid according to. the axial direction of circulation between said wall ( 7 . 8th ) and the serpentine ( 5 ), characterized in that - the spacer elements ( 18 . 19 ) at least one tangential, helical spacer rib ( 18 . 19 ) protruding from one opposite a serpentine ( 5 ) oriented wall ( 7 . 8th ), this tangential spiral ribbing (FIG. 18 . 19 ) and these serpentines ( 5 ) have such different rolling directions that they are in contact according to substantially punctiform contact zones. Exchanger according to claim 1, characterized in that said tangential helical ribbing ( 18 . 19 ) and these serpentines ( 5 ) have such different steps that they are in contact according to substantially punctiform contact areas. Exchanger according to claim 1 or 2, characterized in that the rolling direction of at least one of the tangential, spiral spacer ribs ( 18 . 19 ) of the serpentine ( 5 ) is opposite. Exchanger according to claim 2 or 3, characterized in that the step comprises at least one of the tangential spiral spacer ribs ( 18 . 19 ) is larger than that opposite the serpentine ( 5 ). An exchanger according to claim 4, characterized in that the step of at least one tangential, spiral spacer ribs ( 18 . 19 ) between 1.5 and 3 times the step of the serpentine ( 5 ) is opposite. Exchanger according to claims 1 to 5, characterized in that each core ( 6 ) at least one as inner ribbing ( 19 ) denotes tangential spacer ribbing ( 19 ). Exchanger according to claims 1 to 6, characterized in that each exchanger well ( 9 ) of the inner wall ( 8th ) of the housing ( 1 ) at least one outer ribbing ( 18 ) denotes tangential spacer ribbing ( 18 ). Exchanger according to claim 1 to 6, characterized in that in at least one exchanger recess ( 9 ) the core ( 6 ) at least one as inner ribbing ( 19 ) has tangential spacer ribbing and the inner wall ( 8th ) of the housing ( 1 ) at least one outer ribbing ( 18 ) has tangential spacer ribbing. Exchanger according to claim 8, characterized in that each exchanger recess ( 9 ) at least one inner ribbing ( 19 ) and at least one outer ribbing ( 18 ) having. Exchanger according to claim 2 and claim 8 or 9, characterized in that the exchanger recess ( 9 ) a spiral inner ribbing ( 19 ) and a spiral outer ribbing ( 18 ) and that the step of inner ribbing ( 19 ) from the step of outer ribbing ( 18 ) is different. Exchanger according to claim 10, characterized in that the step of outer ribbing ( 18 ) is greater than the step of inner ribbing ( 19 ), which in turn is larger than the step in the exchange ( 9 ) containing serpentine (s) ( 5 ). Exchanger according to claim 10 or 11, characterized in that the outer ribbing ( 18 ) and the inner ribbing ( 19 ) have the same rolling direction. Exchanger according to claim 1 to 12, characterized in that the housing ( 1 ) for each internal chamber ( 3 ) two bowls ( 1a . 1b ), each forming a cylinder half and abutting each other through an axial connecting plane ( 2 ) are assembled. Exchanger according to claim 13, characterized in that the housing ( 1 ) with passage openings ( 12 . 16 ) of the ends of the axis ( 4 ) of the internal chamber ( 3 ) orthogonal serpentine ( 5 ) is provided. Exchanger according to claim 1 to 14, characterized in that at least one exchange recess ( 9 ) with at least one wedge series ( 20 ) which is adapted to move between turns of the serpentine ( 5 ) so as to hold the relative axial spacing thereof. Exchanger according to claim 15, characterized in that the exchanger recess ( 9 ) from the internal wall ( 8th ) of the housing ( 1 ) projecting wedges ( 20 ) having. Exchanger according to claims 1 to 16, characterized in that it comprises a unique exchanger recess ( 9 ), which has a unique serpentine ( 5 ), whereby the exchanger interchange ( 9 ) has a radial width at least substantially equal to the sum of the radial thickness of the outer ( 18 ) and inner ( 19 ) tangential ribs and the diameter of the right section of the serpentine ( 5 ) forming tube corresponds. Exchanger according to claims 1 to 17, characterized in that at least one internal chamber ( 3 ), the internal wall ( 8th ) of the corresponding housing, the exchanger recess ( 9 ), each core ( 6 ) and its wall ( 7 ), every serpentine ( 5 ) and any tangential ribbing ( 18 . 19 ) globally about one and the same axis parallel to the axial circulation axis ( 4 ) are cylindrical. Exchanger according to claims 1 to 18, characterized characterized in that the radial width of a exchanger recess ( 9 ) is of the order of 10 mm to 15 mm, and the outer diameter of the right section of the tube, which is the serpentine ( 5 ) of this exchange ( 9 ) is on the order of 7 mm to 13 mm. Exchanger according to claims 1 to 19, characterized in that the radial thickness of each tangential spacer rib ( 18 . 19 ) is included between 1 mm and 3 mm. Exchanger according to claim 1 to 20, characterized in that the housing ( 1 ) and each core ( 6 ) are molded from a molded synthetic material and each serpentine ( 5 ) is formed of a metal or a metal alloy.